US20050191546A1 - Rechargeable battery having pliable cell and manufacturing method thereof - Google Patents
Rechargeable battery having pliable cell and manufacturing method thereof Download PDFInfo
- Publication number
- US20050191546A1 US20050191546A1 US11/066,814 US6681405A US2005191546A1 US 20050191546 A1 US20050191546 A1 US 20050191546A1 US 6681405 A US6681405 A US 6681405A US 2005191546 A1 US2005191546 A1 US 2005191546A1
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- US
- United States
- Prior art keywords
- case
- covering member
- rechargeable battery
- open end
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 239000011245 gel electrolyte Substances 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 239000003562 lightweight material Substances 0.000 claims description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007648 laser printing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/136—Flexibility or foldability
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/4911—Electric battery cell making including sealing
Definitions
- the present invention relates to a rechargeable battery having a pliable cell, and more particularly, to a rechargeable battery having a pliable cell having a compact size and improved strength for withstanding an external impact.
- a rechargeable battery having a battery cell using a pliable gel electrolyte is drawing much attention.
- An example of such a battery is a lithium polymer battery, which has a long life span, high reliability and good transformability.
- a rechargeable battery is constructed by housing a pliable battery cell, an electric circuit and other related components within a case made of a strong material in order to protect the components from an external impact.
- rechargeable batteries for use in the portable electronic equipment should also be small in size, light in weight and be manufactured into a variety of shapes.
- the external case of the rechargeable battery should be able to protect the battery cell while having a compact size so as not to increase the overall size of the battery.
- the case's structure should also be uncomplicated so that manufacturing of the case is simple, fast and reliable.
- the present invention is directed to a rechargeable battery having a pliable cell.
- the rechargeable battery has a compact size and improved strength for withstanding an external impact.
- a rechargeable battery comprising a case having an internal space and an open end, a battery cell installed within the case, the battery cell made of pliable material and having a surface electrically connected to a circuit board at the open end of the case, and a covering member for hermetically sealing the open end of the case is provided.
- the covering member at least partially encapsulates the circuit board to allow an external terminal of the circuit board to be externally exposed.
- the case is formed to fit an exterior of the battery cell.
- the case has monolithic construction and comprises a strong and lightweight material, such as aluminum or stainless steel.
- the covering member is injection molded to the open end of the case, wherein the covering member is injection molded at a low temperature and pressure, and is formed between an inner portion of the case and the circuit board. Furthermore, the covering member is formed such that a surface of the covering member is a predetermined distance away from the battery cell.
- the covering member may be formed of a material such as a nylon-based resin.
- the battery cell has a gel electrolyte and the rechargeable battery may be a lithium polymer battery.
- the circuit board may be located a predetermined distance away from, and on the outer side of, the open end of the case.
- a method for manufacturing a rechargeable battery comprises installing a battery cell within a case, wherein the case has an internal space and an open end and the battery cell is made of pliable material, electrically connecting a surface of the battery cell to a circuit board at the open end of the case, and hermetically sealing the open end of the case with a covering member.
- the covering member at least partially encapsulates the circuit board to allow an external terminal of the circuit board to be externally exposed.
- the case is formed to fit an exterior of the battery cell.
- the case has monolithic construction and comprises a strong and lightweight material, such as aluminum or stainless steel.
- the covering member is injection molded to the open end of the case, wherein the covering member is injection molded at a low temperature and pressure, and is formed between an inner portion of the case and the circuit board. Furthermore, the covering member is formed such that a surface of the covering member is a predetermined distance away from the battery cell.
- the covering member may be formed of a material such as a nylon-based resin.
- the battery cell has a gel electrolyte and the rechargeable battery may be a lithium polymer battery.
- the circuit board may be located a predetermined distance away from, and on the outer side of, the open end of the case.
- FIG. 1 is a perspective view of a rechargeable battery having a pliable cell in accordance with one embodiment of the present invention.
- FIG. 2 is a perspective view of a rechargeable battery having a pliable cell as partially removed from a covering member in accordance with one embodiment of the present invention.
- FIG. 3 is a partial longitudinal sectional view along line VI-VI of the rechargeable battery of FIG. 1 .
- FIG. 4 is a partial longitudinal sectional view along line VII-VII of the rechargeable battery of FIG. 1 .
- a rechargeable battery 1 comprises a case 10 having an internal space and an open end.
- a battery cell 20 is housed within the case 10 .
- the battery cell 20 is made of a pliable material and has a surface electrically connected to a circuit board 30 positioned at the open end of the case 10 .
- the circuit board 30 is located on the outer side of the case 10 and comprises an external terminal 50 .
- the circuit board 30 further comprises a protection circuit for protecting against electrical damage due to overcharging or overdischarging of the rechargeable battery, a power terminal and an ID pattern terminal (not shown in FIG. 2 ).
- the rechargeable battery 1 further comprises a covering member 40 , as shown in FIG. 4 , for hermetically sealing the open end of the case 10 .
- the covering member 40 encompasses the circuit board 30 while allowing the external terminal 50 to be externally exposed.
- the case 10 is formed to fit an exterior of the pliable battery cell 20 .
- the case 10 also has a rectangular parallelepiped shape.
- an end of the case 10 is open so that the battery cell 20 can be inserted into the case 10 .
- the case 10 has monolithic construction to strengthen the case 10 and simplify the assembly of the rechargeable battery 1 .
- the case 10 is made of a strong and lightweight material, such as aluminum or stainless steel, to provide protection against an external impact and corrosion.
- the circuit board 30 is removably coupled to the open end of the case 10 when the battery cell 20 is inserted into the case 10 .
- the covering member 40 may be injection molded to the open end of the case 10 , wherein the injected molded covering member 40 at least partially encloses on encapsulates the circuit board 30 within in an air-tight manner.
- the covering member 40 is molded such that the battery cell 20 connected to the circuit board 30 is hermetically sealed in the case 10 and the external terminal 50 of the circuit board 30 is exposed from the open end of the case 10 .
- the covering member 40 is injection molded to the inside of the open end of the case 10 . Accordingly, the circuit board 30 is preferably located a predetermined distance away from the case 10 and protrudes outwardly from the case 10 so as not to block the open end of the case 10 . Additionally, the covering member 40 is injection molded such that a surface of the covering member 40 nearest the battery cell 20 maintains a predetermined distance away from the battery cell 20 .
- the covering member 40 is made of a nylon-based resin and is injection molded at a relatively low temperature and pressure so that no damage is caused to any of the internal elements of the rechargeable battery 1 , such as the circuit board 30 . While injection molding is preferred, it is contemplated that the covering member 40 may seal the open end of the case 10 by other methods known in the art.
- the structure of the rechargeable battery 1 may be employed for a battery, such as a lithium polymer battery, having a gel electrolyte as a separator of the battery cell 20 .
- a hole with a predetermined shaped may be formed on the case 10 at a surface opposite the open end of the case 10 to expose the external terminal 50 of the circuit board 30 . Accordingly, the battery cell 20 may be inserted in the case 10 , making the circuit board 30 meet the surface of the case 10 where the hole is formed. The open end of the case 10 may then be covered by injection molding the covering member 40 .
- a method for manufacturing a rechargeable battery comprises installing a battery cell 20 within a case 10 .
- the case 10 has an internal space and an open end.
- the battery cell 20 is made of a pliable material.
- a surface of the battery cell 20 is electrically connected to a circuit board 30 at the open end of the case. After, the open end of the case is hermetically sealed with a covering member.
- the covering member 40 is formed on the open end of the case by an injection molding method; thus, the process is performed in a simple and speedy manner, and the reliability of the covering member is remarkably improved. Also, when the covering member 40 is formed using the injection molding method, the molding is performed at a relatively low temperature and pressure, such as below 20° C. and 40 bar. This is preferable so that internal parts of the battery, such as the battery cell 20 and the circuit board 30 , may be protected from damage when forming the covering member 40 .
- the covering member 40 is injection molded a predetermined distance away from the battery cell 20 . This also serves to protect internal parts of the battery from damage. Preferably, the covering member 40 is injection molded to the inside of the case 10 so as not to be separated from the case 10 when the battery suffers an external impact.
- the injection molded covering member 40 is preferably made of a nylon-based resin; however, the covering member may be made of other materials capable of being injection molded in accordance with other aspects of the invention.
- the battery cell 20 is preferably installed inside the case 10 with the circuit board 30 exposed outside the case 10 .
- the case 10 is preferably made of aluminum or stainless steel but may also be made of other materials having good formability and high strength.
- the rechargeable battery assembled by the above-described manufacturing method is used for a battery, such as a lithium polymer battery, having a gel electrolyte as a separator of the battery cell 20 .
- a battery cell made of a pliable material and connected to a circuit board is inserted into a case.
- An open end of the case is sealed by a covering member.
- the covering member is injection molded at a low temperature and pressure so that the exterior of the battery can strongly endure an external impact while having a simple structure.
- the exterior of the battery can endure against water or moisture.
- label printing or laser printing may be performed on the exterior, thus allowing the exterior to be more aesthetically pleasing.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
- Pursuant to 35 U.S.C. § 119(a), this application claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2004-13807, filed on Feb. 28, 2004, the contents of which is hereby incorporated by reference herein in its entirety.
- 1. Field of the Invention
- The present invention relates to a rechargeable battery having a pliable cell, and more particularly, to a rechargeable battery having a pliable cell having a compact size and improved strength for withstanding an external impact.
- 2. Description of the Related Art
- Recently, with the significant development of portable electronic equipment, many types of secondary batteries, capable of being repetitively discharged and recharged, are increasingly used. Accordingly, these types of batteries have rapidly improved with regard to performance and life span. Among the many types of secondary batteries, a rechargeable battery having a battery cell using a pliable gel electrolyte is drawing much attention. An example of such a battery is a lithium polymer battery, which has a long life span, high reliability and good transformability. Generally, such a rechargeable battery is constructed by housing a pliable battery cell, an electric circuit and other related components within a case made of a strong material in order to protect the components from an external impact.
- As portable electronic equipment have developed, they have become smaller in size and lighter in weight. Furthermore, the equipment has been manufactured into a variety of shapes. Accordingly, rechargeable batteries for use in the portable electronic equipment should also be small in size, light in weight and be manufactured into a variety of shapes. Moreover, the external case of the rechargeable battery should be able to protect the battery cell while having a compact size so as not to increase the overall size of the battery. The case's structure should also be uncomplicated so that manufacturing of the case is simple, fast and reliable.
- The present invention is directed to a rechargeable battery having a pliable cell. The rechargeable battery has a compact size and improved strength for withstanding an external impact.
- Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
- To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, a rechargeable battery comprising a case having an internal space and an open end, a battery cell installed within the case, the battery cell made of pliable material and having a surface electrically connected to a circuit board at the open end of the case, and a covering member for hermetically sealing the open end of the case is provided.
- In accordance with one aspect of the present invention, the covering member at least partially encapsulates the circuit board to allow an external terminal of the circuit board to be externally exposed. The case is formed to fit an exterior of the battery cell. Preferably, the case has monolithic construction and comprises a strong and lightweight material, such as aluminum or stainless steel.
- Preferably, the covering member is injection molded to the open end of the case, wherein the covering member is injection molded at a low temperature and pressure, and is formed between an inner portion of the case and the circuit board. Furthermore, the covering member is formed such that a surface of the covering member is a predetermined distance away from the battery cell. The covering member may be formed of a material such as a nylon-based resin.
- In accordance with another aspect of the present invention, the battery cell has a gel electrolyte and the rechargeable battery may be a lithium polymer battery. Moreover, the circuit board may be located a predetermined distance away from, and on the outer side of, the open end of the case.
- In another embodiment, a method for manufacturing a rechargeable battery is provided. The method comprises installing a battery cell within a case, wherein the case has an internal space and an open end and the battery cell is made of pliable material, electrically connecting a surface of the battery cell to a circuit board at the open end of the case, and hermetically sealing the open end of the case with a covering member.
- In accordance with one aspect of the present invention, the covering member at least partially encapsulates the circuit board to allow an external terminal of the circuit board to be externally exposed. The case is formed to fit an exterior of the battery cell. Preferably, the case has monolithic construction and comprises a strong and lightweight material, such as aluminum or stainless steel.
- Preferably, the covering member is injection molded to the open end of the case, wherein the covering member is injection molded at a low temperature and pressure, and is formed between an inner portion of the case and the circuit board. Furthermore, the covering member is formed such that a surface of the covering member is a predetermined distance away from the battery cell. The covering member may be formed of a material such as a nylon-based resin.
- In accordance with another embodiment, the battery cell has a gel electrolyte and the rechargeable battery may be a lithium polymer battery. Moreover, the circuit board may be located a predetermined distance away from, and on the outer side of, the open end of the case.
- It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
-
FIG. 1 is a perspective view of a rechargeable battery having a pliable cell in accordance with one embodiment of the present invention. -
FIG. 2 is a perspective view of a rechargeable battery having a pliable cell as partially removed from a covering member in accordance with one embodiment of the present invention. -
FIG. 3 is a partial longitudinal sectional view along line VI-VI of the rechargeable battery ofFIG. 1 . -
FIG. 4 is a partial longitudinal sectional view along line VII-VII of the rechargeable battery ofFIG. 1 . - Referring to
FIGS. 1-4 , in accordance with one embodiment of the present invention, arechargeable battery 1 comprises acase 10 having an internal space and an open end. Abattery cell 20 is housed within thecase 10. Preferably, thebattery cell 20 is made of a pliable material and has a surface electrically connected to acircuit board 30 positioned at the open end of thecase 10. Thecircuit board 30 is located on the outer side of thecase 10 and comprises anexternal terminal 50. - The
circuit board 30 further comprises a protection circuit for protecting against electrical damage due to overcharging or overdischarging of the rechargeable battery, a power terminal and an ID pattern terminal (not shown inFIG. 2 ). Therechargeable battery 1 further comprises a coveringmember 40, as shown inFIG. 4 , for hermetically sealing the open end of thecase 10. The coveringmember 40 encompasses thecircuit board 30 while allowing theexternal terminal 50 to be externally exposed. - Preferably, the
case 10 is formed to fit an exterior of thepliable battery cell 20. Thus, if thebattery cell 20 has a rectangular parallelepiped shape, as shown inFIG. 2 , then thecase 10 also has a rectangular parallelepiped shape. Furthermore, an end of thecase 10 is open so that thebattery cell 20 can be inserted into thecase 10. Preferably, thecase 10 has monolithic construction to strengthen thecase 10 and simplify the assembly of therechargeable battery 1. Moreover, thecase 10 is made of a strong and lightweight material, such as aluminum or stainless steel, to provide protection against an external impact and corrosion. - The
circuit board 30 is removably coupled to the open end of thecase 10 when thebattery cell 20 is inserted into thecase 10. In order to firmly couple the coveringmember 40 to therechargeable battery 1, the coveringmember 40 may be injection molded to the open end of thecase 10, wherein the injected molded coveringmember 40 at least partially encloses on encapsulates thecircuit board 30 within in an air-tight manner. Preferably, the coveringmember 40 is molded such that thebattery cell 20 connected to thecircuit board 30 is hermetically sealed in thecase 10 and theexternal terminal 50 of thecircuit board 30 is exposed from the open end of thecase 10. - Referring to
FIG. 4 , the coveringmember 40 is injection molded to the inside of the open end of thecase 10. Accordingly, thecircuit board 30 is preferably located a predetermined distance away from thecase 10 and protrudes outwardly from thecase 10 so as not to block the open end of thecase 10. Additionally, the coveringmember 40 is injection molded such that a surface of the coveringmember 40 nearest thebattery cell 20 maintains a predetermined distance away from thebattery cell 20. - In one embodiment, the covering
member 40 is made of a nylon-based resin and is injection molded at a relatively low temperature and pressure so that no damage is caused to any of the internal elements of therechargeable battery 1, such as thecircuit board 30. While injection molding is preferred, it is contemplated that the coveringmember 40 may seal the open end of thecase 10 by other methods known in the art. - In accordance with one aspect of the present invention, the structure of the
rechargeable battery 1 may be employed for a battery, such as a lithium polymer battery, having a gel electrolyte as a separator of thebattery cell 20. - Additionally, although not shown in the figures, a hole with a predetermined shaped may be formed on the
case 10 at a surface opposite the open end of thecase 10 to expose theexternal terminal 50 of thecircuit board 30. Accordingly, thebattery cell 20 may be inserted in thecase 10, making thecircuit board 30 meet the surface of thecase 10 where the hole is formed. The open end of thecase 10 may then be covered by injection molding the coveringmember 40. - In another embodiment of the present invention, a method for manufacturing a rechargeable battery is provided. The method comprises installing a
battery cell 20 within acase 10. Preferably, thecase 10 has an internal space and an open end. Also, thebattery cell 20 is made of a pliable material. A surface of thebattery cell 20 is electrically connected to acircuit board 30 at the open end of the case. After, the open end of the case is hermetically sealed with a covering member. - The covering
member 40 is formed on the open end of the case by an injection molding method; thus, the process is performed in a simple and speedy manner, and the reliability of the covering member is remarkably improved. Also, when the coveringmember 40 is formed using the injection molding method, the molding is performed at a relatively low temperature and pressure, such as below 20° C. and 40 bar. This is preferable so that internal parts of the battery, such as thebattery cell 20 and thecircuit board 30, may be protected from damage when forming the coveringmember 40. - Furthermore, the covering
member 40 is injection molded a predetermined distance away from thebattery cell 20. This also serves to protect internal parts of the battery from damage. Preferably, the coveringmember 40 is injection molded to the inside of thecase 10 so as not to be separated from thecase 10 when the battery suffers an external impact. - The injection molded covering
member 40 is preferably made of a nylon-based resin; however, the covering member may be made of other materials capable of being injection molded in accordance with other aspects of the invention. In order to facilitate the coveringmember 40 being injection molded up to the inside of thecase 10, thebattery cell 20 is preferably installed inside thecase 10 with thecircuit board 30 exposed outside thecase 10. Thecase 10 is preferably made of aluminum or stainless steel but may also be made of other materials having good formability and high strength. - In one embodiment of the present invention, the rechargeable battery assembled by the above-described manufacturing method is used for a battery, such as a lithium polymer battery, having a gel electrolyte as a separator of the
battery cell 20. - As so far described, in the rechargeable battery having a pliable cell according to the present invention, a battery cell made of a pliable material and connected to a circuit board is inserted into a case. An open end of the case is sealed by a covering member. The covering member is injection molded at a low temperature and pressure so that the exterior of the battery can strongly endure an external impact while having a simple structure.
- Additionally, because a process for forming the exterior of the battery is simple, measurement precision is high and defection proportion decreases. Accordingly, fabrication costs are reduced.
- Moreover, by completely sealing the open end of the case with the covering member, the exterior of the battery can endure against water or moisture. Also, label printing or laser printing may be performed on the exterior, thus allowing the exterior to be more aesthetically pleasing.
- As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (28)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2004-0013807 | 2004-02-28 | ||
KR1020040013807A KR100664113B1 (en) | 2004-02-28 | 2004-02-28 | Soft cell internal type battery |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050191546A1 true US20050191546A1 (en) | 2005-09-01 |
US7682734B2 US7682734B2 (en) | 2010-03-23 |
Family
ID=36093575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/066,814 Expired - Fee Related US7682734B2 (en) | 2004-02-28 | 2005-02-25 | Rechargeable battery having pliable cell and manufacturing method thereof |
Country Status (4)
Country | Link |
---|---|
US (1) | US7682734B2 (en) |
JP (1) | JP4351642B2 (en) |
KR (1) | KR100664113B1 (en) |
CN (1) | CN100459224C (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060257731A1 (en) * | 2005-04-26 | 2006-11-16 | Samsung Sdi Co., Ltd. | Polymer battery pack and manufacturing method of the same |
US20070037045A1 (en) * | 2005-08-12 | 2007-02-15 | Sony Corporation | Secondary battery |
US20070287063A1 (en) * | 2004-07-23 | 2007-12-13 | Masaru Hiratsuka | Battery Pack |
US20140023894A1 (en) * | 2012-07-18 | 2014-01-23 | Patrick Jansen | Energy storage device and method |
US10950912B2 (en) | 2017-06-14 | 2021-03-16 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
US20230207976A1 (en) * | 2016-04-13 | 2023-06-29 | Semiconductor Energy Laboratory Co., Ltd. | Battery module, method for manufacturing battery module, and electronic device |
Families Citing this family (10)
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KR100884473B1 (en) | 2007-03-28 | 2009-02-20 | 삼성에스디아이 주식회사 | Polymer battery pack |
KR101146675B1 (en) | 2010-08-09 | 2012-05-23 | 삼성에스디아이 주식회사 | Battery Pack |
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Cited By (14)
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US20070287063A1 (en) * | 2004-07-23 | 2007-12-13 | Masaru Hiratsuka | Battery Pack |
US20060257731A1 (en) * | 2005-04-26 | 2006-11-16 | Samsung Sdi Co., Ltd. | Polymer battery pack and manufacturing method of the same |
US8691425B2 (en) * | 2005-04-26 | 2014-04-08 | Samsung Sdi Co., Ltd. | Polymer battery pack and manufacturing method of the same |
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US20070037045A1 (en) * | 2005-08-12 | 2007-02-15 | Sony Corporation | Secondary battery |
US20140023894A1 (en) * | 2012-07-18 | 2014-01-23 | Patrick Jansen | Energy storage device and method |
US9722216B2 (en) * | 2012-07-18 | 2017-08-01 | General Electric Company | Energy storage device and method |
US20230207976A1 (en) * | 2016-04-13 | 2023-06-29 | Semiconductor Energy Laboratory Co., Ltd. | Battery module, method for manufacturing battery module, and electronic device |
US10950912B2 (en) | 2017-06-14 | 2021-03-16 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
US11031651B2 (en) | 2017-06-14 | 2021-06-08 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
US11777151B2 (en) | 2017-06-14 | 2023-10-03 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
US11916203B2 (en) | 2017-06-14 | 2024-02-27 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
US11923514B2 (en) | 2017-06-14 | 2024-03-05 | Milwaukee Electric Tool Corporation | Arrangements for inhibiting intrusion into battery pack electrical components |
Also Published As
Publication number | Publication date |
---|---|
JP4351642B2 (en) | 2009-10-28 |
US7682734B2 (en) | 2010-03-23 |
JP2005243643A (en) | 2005-09-08 |
KR100664113B1 (en) | 2007-01-04 |
KR20050088007A (en) | 2005-09-01 |
CN1741300A (en) | 2006-03-01 |
CN100459224C (en) | 2009-02-04 |
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